If you're looking for a great track pad for your E46, then consider the Hawk HT10. During the time we were building our Spec E46 car, we used the HT10 exclusively with GREAT success. In fact, we like the pad so much, it's what we currently use on our Project BRZ.
The HT10 compound offers great brake modulation, low rotor wear compared to other track pads and a high thermal capacity for the serious track rat.
Optimal Range: 500-1100 F
Min/Max Range: 300-1300 F